KatyBurne

RobinSidel

J.P. Morgan Chase & Co. has limited some employees’ access to the Swift global interbank messaging service amid questions about security breaches at a pair of Asian banks that used the funds-transfer platform, people familiar with the matter said.

The New York bank took the steps in recent weeks to keep tighter control on its links to the service, those people said.

Swift, which stands for the Society for Worldwide Interbank Financial Telecommunication, is a member-owned industry cooperative that handles the bulk of world-wide cross-border payment instructions between banks.

Swift has said its own network wasn’t compromised in the recent attacks at customer sites and last week warned customers to “urgently review controls in their payments environments to all their messaging, payments and e-banking channels,” according to a customer notice reviewed by The Wall Street Journal.

The steps at J.P. Morgan
JPM, +0.43%
are the first sign a major bank is concerned enough about the security of the overall Swift network, in particular malicious software entering the platform’s perimeter, to improve internal security measures.

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